Invalid MEX-file '/filepath​/filename.​mexa64': Gateway function is missing

Hello everyone! I am trying to implement a Matlab wrapper for Graph Cuts (can be found here if it helps: http://www.wisdom.weizmann.ac.il/~bagon/matlab.html), but even though the MEX completes successfully, I get the error: "Invalid MEX-file '/home/agapi/Desktop/GCmex2.0/GraphCut.mexa64': Gateway function is missing".

I am using Ubuntu 18.04 and Matlab R2019b.

I found some similar posts, but nothing helped me. Any help would be appreciated!

Here's the output from MEX in verbose mode (I also tried mex -v -R2017b):

>> mex -v -R2018a /home/agapi/Desktop/GCmex2.0/GraphCut.cpp

Verbose mode is on.

... Looking for compiler 'g++' ...

... Executing command 'which g++' ...Yes ('/usr/bin/g++').

... Executing command 'g++ -print-file-name=libstdc++.so' ...Yes ('/usr/lib/gcc/x86_64-linux-gnu/7/libstdc++.so').

... Executing command 'g++ -dumpversion' ...Yes ('7').

... Executing command 'which g++' ...Yes ('/usr/bin/g++').

... Looking for folder '/usr' ...Yes.

... Executing command 'g++ -dumpmachine' ...Yes ('x86_64-linux-gnu').

Found installed compiler 'g++'.

Set INCLUDE = /usr/lib/gcc/x86_64-linux-gnu/7/include;/usr/include/c++/7;/usr/include/c++/7/x86_64-linux-gnu;/usr/include/c++/7/backward;/usr/lib/gcc/x86_64-linux-gnu/7/include;/usr/include/c++/7;/usr/include/c++/7/x86_64-linux-gnu;/usr/include/c++/7/backward;

Options file details

-------------------------------------------------------------------

Compiler location: /usr/bin/g++

Options file: /home/agapi/.matlab/R2019b/mex_C++_glnxa64.xml

CMDLINE2 : /usr/bin/g++ -pthread -Wl,--no-undefined -shared -O -Wl,--version-script,"/usr/local/MATLAB/R2019b/extern/lib/glnxa64/c_exportsmexfileversion.map" /tmp/mex_8362525622774_7001/GraphCut.o /tmp/mex_8362525622774_7001/cpp_mexapi_version.o -Wl,--as-needed -Wl,-rpath-link,/usr/local/MATLAB/R2019b/bin/glnxa64 -L"/usr/local/MATLAB/R2019b/bin/glnxa64" -Wl,-rpath-link,/usr/local/MATLAB/R2019b/extern/bin/glnxa64 -L"/usr/local/MATLAB/R2019b/extern/bin/glnxa64" -lMatlabDataArray -lmx -lmex -lmat -lm -lstdc++ -o GraphCut.mexa64

CXX : /usr/bin/g++

DEFINES : -DMX_COMPAT_64 -DMATLAB_MEXCMD_RELEASE=R2018a -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE

MATLABMEX : -DMATLAB_MEX_FILE

CFLAGS : -fexceptions -fPIC -fno-omit-frame-pointer -pthread

CXXFLAGS : -fexceptions -fPIC -fno-omit-frame-pointer -pthread -std=c++11

INCLUDE : -I"/usr/local/MATLAB/R2019b/extern/include" -I"/usr/local/MATLAB/R2019b/simulink/include"

CXXOPTIMFLAGS : -O2 -fwrapv -DNDEBUG

CXXDEBUGFLAGS : -g

LDXX : /usr/bin/g++

LDFLAGS : -pthread -Wl,--no-undefined

LDTYPE : -shared

LINKEXPORT : -Wl,--version-script,"/usr/local/MATLAB/R2019b/extern/lib/glnxa64/mexFunction.map"

LINKEXPORTVER : -Wl,--version-script,"/usr/local/MATLAB/R2019b/extern/lib/glnxa64/c_exportsmexfileversion.map"

LINKLIBS : -Wl,--as-needed -Wl,-rpath-link,/usr/local/MATLAB/R2019b/bin/glnxa64 -L"/usr/local/MATLAB/R2019b/bin/glnxa64" -Wl,-rpath-link,/usr/local/MATLAB/R2019b/extern/bin/glnxa64 -L"/usr/local/MATLAB/R2019b/extern/bin/glnxa64" -lMatlabDataArray -lmx -lmex -lmat -lm -lstdc++

LDOPTIMFLAGS : -O

LDDEBUGFLAGS : -g

MWCPPLIB : "/usr/local/MATLAB/R2019b/sys/os/glnxa64/libstdc++.so.6"

OBJEXT : .o

LDEXT : .mexa64

SETENV : CC="gcc"

CXX="/usr/bin/g++"

CFLAGS="-fexceptions -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_64 -DMATLAB_MEXCMD_RELEASE=R2018a -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE "

CXXFLAGS="-fexceptions -fPIC -fno-omit-frame-pointer -pthread -std=c++11 -DMX_COMPAT_64 -DMATLAB_MEXCMD_RELEASE=R2018a -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE "

COPTIMFLAGS="-O2 -fwrapv -DNDEBUG"

CXXOPTIMFLAGS="-O2 -fwrapv -DNDEBUG"

CDEBUGFLAGS="-g"

CXXDEBUGFLAGS="-g"

LD="gcc"

LDXX="/usr/bin/g++"

LDFLAGS="-pthread -Wl,--no-undefined -shared -Wl,--as-needed -Wl,-rpath-link,/usr/local/MATLAB/R2019b/bin/glnxa64 -L"/usr/local/MATLAB/R2019b/bin/glnxa64" -Wl,-rpath-link,/usr/local/MATLAB/R2019b/extern/bin/glnxa64 -L"/usr/local/MATLAB/R2019b/extern/bin/glnxa64" -lMatlabDataArray -lmx -lmex -lmat -lm -lstdc++ -Wl,--version-script,"/usr/local/MATLAB/R2019b/extern/lib/glnxa64/mexFunction.map""

LDDEBUGFLAGS="-g"

GCC : /usr/bin/g++

CPPLIB_DIR : /usr/lib/gcc/x86_64-linux-gnu/7/libstdc++.so

VER : 7

GCCDIR : /usr

GCC_TARGET : x86_64-linux-gnu

MATLABROOT : /usr/local/MATLAB/R2019b

ARCH : glnxa64

SRC : "/home/agapi/Desktop/GCmex2.0/GraphCut.cpp";"/usr/local/MATLAB/R2019b/extern/version/cpp_mexapi_version.cpp"

OBJ : /tmp/mex_8362525622774_7001/GraphCut.o;/tmp/mex_8362525622774_7001/cpp_mexapi_version.o

OBJS : /tmp/mex_8362525622774_7001/GraphCut.o /tmp/mex_8362525622774_7001/cpp_mexapi_version.o

SRCROOT : /home/agapi/Desktop/GCmex2.0/GraphCut

DEF : /tmp/mex_8362525622774_7001/GraphCut.def

EXP : "GraphCut.exp"

LIB : "GraphCut.lib"

EXE : GraphCut.mexa64

ILK : "GraphCut.ilk"

MANIFEST : "GraphCut.mexa64.manifest"

TEMPNAME : GraphCut

EXEDIR :

EXENAME : GraphCut

OPTIM : -O2 -fwrapv -DNDEBUG

LINKOPTIM : -O

CMDLINE1_0 : /usr/bin/g++ -c -DMX_COMPAT_64 -DMATLAB_MEXCMD_RELEASE=R2018a -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2019b/extern/include" -I"/usr/local/MATLAB/R2019b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -std=c++11 -O2 -fwrapv -DNDEBUG "/home/agapi/Desktop/GCmex2.0/GraphCut.cpp" -o /tmp/mex_8362525622774_7001/GraphCut.o

CMDLINE1_1 : /usr/bin/g++ -c -DMX_COMPAT_64 -DMATLAB_MEXCMD_RELEASE=R2018a -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2019b/extern/include" -I"/usr/local/MATLAB/R2019b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -std=c++11 -O2 -fwrapv -DNDEBUG "/usr/local/MATLAB/R2019b/extern/version/cpp_mexapi_version.cpp" -o /tmp/mex_8362525622774_7001/cpp_mexapi_version.o

-------------------------------------------------------------------

Building with 'g++'.

Warning: You are using gcc version '7.4.0'. The version of gcc is not supported. The version currently supported with MEX is

'6.3.x'. For a list of currently supported compilers see: https://www.mathworks.com/support/compilers/current_release.

/usr/bin/g++ -c -DMX_COMPAT_64 -DMATLAB_MEXCMD_RELEASE=R2018a -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2019b/extern/include" -I"/usr/local/MATLAB/R2019b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -std=c++11 -O2 -fwrapv -DNDEBUG "/home/agapi/Desktop/GCmex2.0/GraphCut.cpp" -o /tmp/mex_8362525622774_7001/GraphCut.o

/usr/bin/g++ -c -DMX_COMPAT_64 -DMATLAB_MEXCMD_RELEASE=R2018a -DUSE_MEX_CMD -D_GNU_SOURCE -DMATLAB_MEX_FILE -I"/usr/local/MATLAB/R2019b/extern/include" -I"/usr/local/MATLAB/R2019b/simulink/include" -fexceptions -fPIC -fno-omit-frame-pointer -pthread -std=c++11 -O2 -fwrapv -DNDEBUG "/usr/local/MATLAB/R2019b/extern/version/cpp_mexapi_version.cpp" -o /tmp/mex_8362525622774_7001/cpp_mexapi_version.o

/usr/bin/g++ -pthread -Wl,--no-undefined -shared -O -Wl,--version-script,"/usr/local/MATLAB/R2019b/extern/lib/glnxa64/c_exportsmexfileversion.map" /tmp/mex_8362525622774_7001/GraphCut.o /tmp/mex_8362525622774_7001/cpp_mexapi_version.o -Wl,--as-needed -Wl,-rpath-link,/usr/local/MATLAB/R2019b/bin/glnxa64 -L"/usr/local/MATLAB/R2019b/bin/glnxa64" -Wl,-rpath-link,/usr/local/MATLAB/R2019b/extern/bin/glnxa64 -L"/usr/local/MATLAB/R2019b/extern/bin/glnxa64" -lMatlabDataArray -lmx -lmex -lmat -lm -lstdc++ -o GraphCut.mexa64

MEX completed successfully.

>> GraphCut

Invalid MEX-file '/home/agapi/Desktop/GCmex2.0/GraphCut.mexa64': Gateway function is missing

[Jiajia]

I have a similar problem when using ubuntu 18 and Matllab R2018a. Was anyone able to figure out a solution to this problem?